Rocketed to Earth as an infant from the doomed planet Krypton, Kal-El was adopted by the loving Kent family and raised in America's heartland as Clark Kent. Using his immense solar-fueled powers, he became Superman to defend mankind against all manner of threats while championing truth, justice and the American way!

Superman is a way better leader than Batman. Batman basically trusts nobody, while Superman is inspiring. However, I must agree with @John Valentine: as Nightwing is the best of both worlds, yet under-utilized in a leadership role.

Superman. Batman is an excellent strategist, but Superman doesn't keep anything from anyone, and he communicates with his teammates. Batman just sort of assigns roles and expects them to do their jobs.

Both have pros and cons. Batman is the better strategist and crimesolver, but his a loner. Superman is more inspiring but is mora of a punch first and ask questions later which can get him in to trouble so they spit the leadership role,

Superman is more likely to get punched first. He'll normally only attacks absolute definitive threats first based on knowledge. Like Doomsday, he knows there is no reasoning with, so if he looks ready to go, Sups will jump at him. Superman is a bit more reckless because of his invulnerability, but Batman is also ballsy, it is just his planning makes him seem less reckless, not matter how you look at it, most people won't make a plan that involves most of the stunts Batman pulls off.

Superman. Batman is an excellent strategist, but Superman doesn't keep anything from anyone, and he communicates with his teammates. Batman just sort of assigns roles and expects them to do their jobs.

It's a mixed bag for me. Batman has experience with leadership with the bat family and is the better strategist, but he's a loner and doesn't communicate we'll with his teammates which can cause problems. Superman is very charismatic and very trusting but isn't as good at strategy and not as experienced in that field. Nightwing is definitely the best leader.

Nightwing could possibly be a good leader but as of right now, i dont feel that he has the experience to lead an entire team, Superman is cool and a courageous leader, but for me Batman takes the take on the leader position, he has the smart, cunning, and frankly one must be a little cynical to be a leader.